Door locking handle assembly of double lock type

ABSTRACT

A door locking handle assembly with two locks makes its locking function and appearance stricter. Keys of these locks may lock and unlock a door handle ( 15 ). The assembly may permit only one of the keys to unlock the handle ( 15 ), if necessary. The handle ( 15 ) is mounted on a door (B) and capable of extending from and entering a handle holder ( 10 ) mounted on the door (B). A first lock ( 30 ) and a second lock ( 40 ) are mounted on a free end of the handle ( 15 ) and the holder ( 10 ), respectively, and adjacent to each other, and are provided with a first movable locking element ( 32 ) and a second movable locking element ( 42 ), respectively. When these locking elements ( 32, 42 ) are engaged with each other, the handle ( 15 ) is locked. When they ( 32, 42 ) are disengaged, the handle ( 15 ) is unlocked.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a door locking handle assembly of adouble lock type, wherein a door handle is capable of being pulled outof a handle holder and side-swung thereafter to make it possible to movea door between its locked and unlocked conditions.

2. Description of the Related Art

Heretofore, it has been known to provide a door locking handle assemblyof the single lock type shown in U.S. Pat. No. 5,467,623, hereinincorporated by reference. Such a door locking handle assembly isessentially mounted on a door of a plugboard box or the like such as aninstrument box containing therein various types of instruments. However,the door locking assembly is also widely used in any other place such asa bunkhouse in the site of construction, a warehouse and the like.Recent deterioration in public peace makes door's lock management moreimportant.

Heretofore, in such a door locking handle assembly, a lock employed inthe assembly is typified by cylinder locks and dial locks, and mountedon either a portion of the handle holder or a free end portion of thedoor handle. In general, a door keeping person (hereinafter referred toas the “door keeper”) holds and maintains a key of such a lock.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide a door lockinghandle assembly of a double lock type, wherein: a first and a secondlock are provided in the door locking handle assembly to provide astrict locking mechanism improved in function and also in appearance;and, a first and a second door keeper may hold and maintain a first anda second key, respectively, so as to independently control the doorhandle of the assembly.

It is also possible to control the door locking handle assembly of thepresent invention using a desired one of the first and the second keys,if necessary, wherein such a desired key is held and maintained by asenior one of the door keepers in order to strictly control the assemblythrough the management of the keys.

It is another object of the present invention to provide such a doorlocking handle assembly, wherein: the locks is capable of beingindependently controlled (i.e., locked and unlocked) using any one ofthe keys for convenience in maintenance performed by the door keepers;and, it is also possible for the door keepers to control the locks usinga desired one of the keys, if necessary.

In accordance with a first aspect of the present invention, the aboveobject of the present invention is accomplished by providing:

In a door locking handle assembly of a double lock type having aconstruction in which: a handle holder (10) is mounted on a frontsurface (B1) of a door (B) by means of a screw (11), the screw (11)passing through the door (B) from its rear surface (B2) to fix thehandle holder (10) to the front surface (B1) of the door (B); a handleshaft (12) extending in a direction perpendicular to the plane of thedoor (B) is mounted on a proximal end portion of the handle holder (10);a door handle (15) has its proximal end portion mounted on a front endportion (13) of the handle shaft (12) through a pivot (14) extending ina direction perpendicular to a longitudinal axis of the handle shaft(12), the door handle (15) having its distal end portion swung between afolded position and a raised position in a reciprocating manner; and, acatch plate for locking the door (B) to a stationary frame element isfixedly mounted on a rear end portion (16) of the handle shaft (12), therear end portion (16) appearing in the rear surface (B2) of the door(B), the improvement wherein:

a first lock (30) and a second lock (40) have their rear end portionsfixedly mounted on an inner surface of a free end portion (17) of thedoor handle (15) and an inner surface of the handle holder (10),respectively, in a manner such that the locks (30, 40) are adjacent toeach other in arrangement; and

the first lock (30) and the second lock (40) are provided with a firstkey (K1) and a second (K2), respectively, to permit a user to lock andunlock the door handle (15) using at least one of the keys (K1, K2).

Further, in accordance with a second aspect of the present invention,the above object of the present invention is accomplished by providing:

The door locking handle assembly of the double lock type as set forth inthe first aspect of the present invention, wherein:

each of the first lock (30) and the second lock (40) is constructed of acylinder lock;

the first key (K1) is inserted into the first lock (30) of the handleholder (10), and turned to rotate a first rotor (31) of the first lock(30), so that a first movable locking element (32) is moved to itslocked position adjacent to the free end portion of the door handle(15), wherein the first movable locking element (32) is constructed ofone of a latch plate and a cam plate; and

the second key (K2) is inserted into the second lock (40) of the doorhandle (15), and turned to rotate a second rotor (41) of the second lock(40), so that a second movable locking element (42) is moved between:its locked position in which the second movable locking element (42) isengaged with the first movable locking element (32); and, its unlockedposition in which the second movable locking element (42) is disengagedfrom the first movable locking element (32), wherein both the lockedposition and the unlocked position of the second movable locking element(42) are adjacent to the first movable locking element (32).

In accordance with a third aspect of the present invention, the aboveobject of the present invention is accomplished by providing:

The door locking handle assembly of the double lock type as set forth inthe first aspect or the second aspect of the present invention, wherein:

the first rotor (31) of the first lock (30) disposed in the handleholder (10) is locked in each of its two locked positions and unlockedin its unlocked position, wherein the two locked positions are angularlyspaced apart from each other by a predetermined angle, each of the twolocked positions being also angularly spaced apart from the unlockedposition by a predetermined angle;

the first movable locking element (32) is locked in each of its twolocked positions and unlocked in its unlocked position, wherein the twolocked positions are angularly spaced apart from each other by apredetermined angle and adjacent to the free end portion (17) of thedoor handle (15), each of the two locked positions being also angularlyspaced apart from the unlocked position by a predetermined angle,wherein a first one of the two locked positions is closer to the freeend portion (17) of the door handle (15) than the other to disable thesecond movable locking element (42) from disengaging from the firstmovable locking element (32) even when the second movable lockingelement (42) is moved to the unlocked position thereof;

the first movable locking element (32) is moved to the other of the twolocked positions thereof to enable the second movable locking element(42) to engage with and disengage from the first movable locking element(32); and

in the unlocked position of the first movable locking element (32), thesecond movable locking element (42) is always disengaged from the firstmovable locking element (32) irrespective of whether the second movablelocking element (42) is in its locked position.

Here, each of the locks may be of any one of types including a cylinderlock, a pin tumbler type, a disc tumbler type, a dial type and the like.In the door locking handle assembly of the present invention, it isessential to insert the keys (K1, K2) in the locks to rotate theirrotors, so that the first movable locking element (32) is engaged withor disengaged from the second movable locking element (42), whereinthese movable locking elements are constructed of the latch plate or thecam plates.

Further, in the door locking handle assembly of the present invention,each of the movable locking elements (32, 42) may be constructed of alatch plate which performs a reciprocating linear motion when driven bythe rotors (32, 41), or may be constructed of a cam plate which performsa rotating motion when driven by the rotors (32, 41).

The door locking handle assembly according to the first and the secondaspect of the present invention enjoys the following effects:

Namely, though the first and second locks (30, 40) are independentlyprovided in the handle holder (10) and the door handle (15), it ispossible for the door keepers to lock and unlock the door handle (15)using any one of these locks (30, 40), which enables any one of the doorkeepers independently to lock and unlock the door handle (15).

Further, in the door locking handle assembly according to the secondaspect of the present invention, since the second movable lockingelement (42) of the second lock 40 is so arranged as to be engaged withthe first movable locking element (32) of the first lock 30 in lockingoperation of the door handle (15), it is possible to unlock the doorhandle (15) by moving any one of the first movable locking element (32)and the second movable locking element (42) to its unlocked position inwhich these movable locking elements (32, 42) are disengaged from eachother.

In the door locking handle assembly according to the third aspect of thepresent invention, it is possible to enable only one or both of the keys(K1, K2) to unlock the door handle (15), which makes it possible to useone of the keys (K1, K2) as a primary control key.

Since the door locking handle assembly of the present invention isprovided with two locks (30, 40), it is possible to make the doorlocking handle assembly of the present invention stricter in lockingmechanism and also in appearance, which may prevent illegal access tothe door locking handle assembly of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects, advantages and features of the presentinvention will be more apparent from the following description taken inconjunction with the accompanying drawings in which:

FIG. 1 is a longitudinal sectional view of a first embodiment of thedoor locking handle assembly of the present invention in its lockedcondition;

FIG. 2 is a front view of the door locking handle assembly shown in FIG.1;

FIG. 3 is a partially broken side view of the door locking handleassembly of the present invention, illustrating the second lock havingbeen disengaged from the first lock;

FIG. 4 is a front view of the door locking handle assembly in acondition in which the second lock is disengaged from the first lock asshown in FIG. 3;

FIG. 5 is a front view of the door locking handle assembly in acondition in which the first lock is in its unlocked position;

FIG. 6 is an enlarged front view of the movable locking elements of asecond embodiment of the door locking handle assembly of the presentinvention, illustrating the first lock being in its locked condition inwhich the second lock can't unlock the door handle at all;

FIG. 7 is an enlarged front view of the movable locking elements of thesecond embodiment of the door locking handle assembly, illustrating themovable locking elements in a condition in which the door handle iscapable of being unlocked using any one of the keys; and

FIG. 8 is an enlarged front view of the movable locking elements of thesecond embodiment of the door locking handle assembly, illustrating themovable locking elements in a condition in which the door handle iscapable of being locked using the first key only.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The best modes for carrying out the present invention will be describedin detail using a first and a second embodiment of the present inventionwith reference to the accompanying drawings.

First Embodiment

A first embodiment of a door locking handle assembly according to thefirst and the second aspect of the present invention is shown in FIGS. 1to 5.

In the drawings, the reference numeral 10 denotes a handle holderprovided with a concave portion 20 in its front surface, as shown inFIG. 1. The handle holder 10 is mounted on a front surface B1 of a doorB by means of a screw 11 which passes through the door B from its rearsurface B2 to fix the handle holder 10 to the front surface B1 of thedoor B. The concave portion 20 of the handle holder 10 receives a doorhandle 15 therein. On the other hand, a handle shaft 12 is mounted on anupper front portion 13 of the handle holder 10 in a manner such that thehandle shaft 12 is rotatable on its longitudinal axis extending in adirection perpendicular to the plane of a door B, but not axiallyslidable in its longitudinal direction relative to the handle holder 10.A pivot 14 extends in a direction perpendicular to the longitudinal axisof the handle shaft 12 to pass through a front end portion of the handleshaft 12, and rotatably supports a proximal end portion of a door handle15 to permit a distal end portion of the door handle 15 to swingablymove between: its folded position embedded in the door handle holder 10;and, its raised position spaced apart forward from a front surface ofthe handle holder 10.

Fixedly mounted on a rear end portion 16 of the handle shaft 12 is acatch plate (not shown), which is substantially similar in constructionto a “catch plate 11” described in U.S. Pat. No. 5,467,623, hereinincorporated by reference. When such a catch plate is turned to extendfrom the rear side of the door B toward a stationary frame element (notshown) of a box containing various instruments and engage with thestationary frame element, the door B is locked to the stationary frameelement. For example, the handle shaft 12 has its rear end portion 16formed into a noncircular shape in cross section such as one of a squareshape, a hexagonal shape, a semi-circular shape and like irregularshapes in cross section, which makes it possible for the above-mentionedcatch plate (not shown) to be non-rotatably fixed to the rear endportion 16 of the handle shaft 12 in an insertion manner. Aftercompletion of insertion, the catch plate is firmly fixed to the rear endportion 16 of the handle shaft 12 using a screw to prevent the catchplate from axially slipping out of the rear end portion 16 of the handleshaft 12.

A first lock 30 is fixedly mounted on a front surface of the handleholder 10 so as to be adjacent to a free end portion 17 of the doorhandle 15, and has its first keyhole 33 exposed forward as viewed inFIG. 2. In operation, as shown in FIG. 2, when a first key K1 (shown inFIG. 1) is inserted into the keyhole 33 and turns a first rotor 31 ofthe first lock 30 through a predetermined angle such as 90 degrees, alarge-diameter portion 36 of a cam plate 32 a (shown in phantom line inFIG. 2) serving as a first movable locking element 32 mechanicallyinterlocked with the first rotor 31 is also turned to move toward andaway from the free end portion 17 of the door handle 15. Such alarge-diameter portion 36 of the cam plate 32 a corresponds to a lockedposition of the first lock 30. As is clear from FIG. 2, the cam plate 32a (shown in phantom line) is also provided with a small-diameter portion37 corresponding an unlocked position of the first lock 30.

On the other hand, a second lock 40, which is substantially similar inconstruction to the first lock 30 except its latch plate 42 a, isfixedly mounted on a front surface of the free end portion 17 of thedoor handle 15 so as to be adjacent to the first lock 30. In operation,as shown in FIG. 2, when a second key K2 (shown in FIG. 1) is insertedinto a second keyhole 43 of the second lock 40 and turns a second rotor41 (shown in FIG. 1) of the second lock 40, the latch plate 42 a (shownin phantom line in FIG. 2) serving as a second movable locking element42 mechanically interlocked with the second rotor 41 is also turned tohave its lower end portion move toward and away from the cam plate 32 aof the first lock 30. As is clear from FIG. 1, when the second rotor 41is turned to have its latch plate 42 a move downward and engaged with arear surface of the cam plate 32 a (shown in FIG. 1) of the first lock30 in an overlapping manner, the door handle 15 is locked to the handleholder 10. In contrast with this, as shown in FIG. 3, when the secondrotor 41 is turned to have its latch plate 42 a move upward andtherefore released from the rear surface of the cam plate 32 a of thefirst lock 30, the door handle 15 is unlocked or released from thehandle holder 10.

In this first embodiment, as is clear from FIGS. 1 and 3, the secondrotor 41 is provided with an eccentric pin 45 which extends rearwardfrom a rear surface of the second rotor 41 to slidably pass through thelatch plate 42 a. More specifically, the eccentric pin 45 is slidablyreceived in a hole of the latch plate 42 a, which makes it possible tolinearly drive the latch plate 42 a up and down in a reciprocatingmanner when the second rotor 41 is turned on its longitudinal axis bymeans of the second key K2. Due to this, the latch plate 42 a is capableof being moved toward and away from the cam plate 32 a of the first lock30 in an area behind the rear surface of the cam plate 32 a.

In operation, the door locking handle assembly of the first embodimentaccording to the first and the second aspect of the present inventionwill be now described.

First, with reference to FIGS. 1 and 2, a process for locking the doorhandle 15 to the handle holder 10 will be described.

The first key K1 is inserted into the first keyhole 33 of the first lock30 to turn the first rotor 31 together with the cam plate 32 a (i.e.,the first movable locking element 32) in a manner such that thelarge-diameter portion 36 of the cam plate 32 a is moved toward the freeend portion 17 of the door handle 15. After the large-diameter portion36 of the cam plate 32 a reaches its highest position as viewed in FIG.2, the first key K1 is removed from the first keyhole 33.

Next, the second key K2 is inserted into the second keyhole 43 of thesecond lock 40 to turn the second rotor 41 in a manner such that thelatch plate 42 a (i.e., the second movable locking element 42) is moveddownward toward the cam plate 32 a of the first lock 30 to place thelatch plate 42 a behind a rear surface of the cam plate 32 a in anoverlapping manner, as viewed in FIG. 1. After the latch plate 42 a isplaced behind the rear surface of the cam plate 32 a in such anoverlapping manner, the second key K2 is removed from the second keyhole43 so that the door handle 15 is locked to the handle holder 10, as isclear from FIGS. 1 and 2. As a result, the door B is locked to thestationary frame element of the box, as described in the above withreference to the prior art (i.e., U.S. Pat. No. 5,467,623).

When the door handle 15 is released from the handle holder 10, the firstkey K1 is inserted into the corresponding first keyhole 33 and tuned sothat the first rotor 31 and the cam plate 32 a are turned to have thelarge-diameter portion 36 of the cam plate 32 a turned through an angleof 90 degrees, whereby the small-diameter portion 37 of the cam plate 32a is oppositely disposed from the latch plate 42 a of the second lock40, which permits the cam plate 32 a to be released from contact withthe latch plate 42 a. As a result, the door handle 15 is completelyreleased from the handle holder 10, as shown in FIG. 5.

As is clear from FIGS. 3 and 4, it is also possible to release the doorhandle 15 from the handle holder 10 by inserting the second key K2 intothe second keyhole 43 of the second lock 40 to turn the second rotor 41.In this process, when the second rotor 41 is turned, the latch plate 42a is moved upward and retracted from the large-diameter portion 36 ofthe cam plate 32 a so that the former is disengaged from the latter,which permits the door handle 15 to be released from the handle holder10 and to have its free end portion 17 swingably moved forward to itsraised position, as viewed in FIG. 3.

Consequently, it is possible for the door locking handle assembly of thepresent invention to have its keys K1, K2 maintained independently bythe individual door keepers, which permits each of the door keepers tolock and unlock the door handle 15 at each door keeper's discretion.

Second Embodiment

FIGS. 6 to 8 shows a second embodiment of the door locking handleassembly according to the third aspect of the present invention.

The second embodiment differs from the first embodiment in that thesecond embodiment employs a slight modification of the cam plate 32 aserving as the first movable locking element 32 of the first lock 30 ofthe first embodiment. Such a slight modification of the cam plate 32 aemployed in the second embodiment will be hereinafter referred to as themodified cam plate 32 a.

More specifically, as is clear from FIG. 6, the modified cam plate 32 ais provided with a largest-diameter portion 36 a and a larger-diameterportion 36 b. These portions 36 a, 36 b are angularly spaced apart fromeach other by a predetermined angle, for example such as an angle of 90degrees, an angle of 120 degrees, or the like. In operation, when eachof these portions 36 a, 36 b is oppositely disposed from the free endportion 17 of the door handle 15, the first rotor 31 may assume each oftwo locked positions. More specifically, in the second embodiment, as isclear from FIGS. 6 and 7, the modified cam plate 32 a of the first rotor31 has two locked positions.

Now, the second embodiment of the present invention will be described inoperation.

The second embodiment is quite similar in construction, action andeffect to the first embodiment except the provision of thelargest-diameter portion 36 a in the modified cam plate 32 a employed inthe second embodiment, as is clear from FIGS. 6 to 8.

As shown in FIG. 6, when the largest-diameter portion 36 a of themodified cam plate 32 a is oppositely disposed from a lower end portionof the latch plate 42 a in an overlapping manner in a condition in whichthe latch plate 42 a is held in its highest position, it is not possiblefor the second key K2 to have the latch plate 42 a disengaged from thelargest-diameter portion 36 a of the modified cam plate 32 a. Incontrast with this, it is possible for the first key K1 to have thelargest-diameter portion 36 a of the modified cam plate 32 a selectivelydisengaged from or engaged again with the lower end portion of the latchplate 42 a.

On the other hand, when the modified cam plate 32 a has itslarger-diameter portion 36 b oppositely disposed from the lower endportion of the latch plate 42 a in an overlapping manner in a conditionin which the latch plate 42 a is held in its lowest position shown inFIG. 7, it is possible for the second key K2 to have the lower endportion of the latch plate 42 a selectively disengaged from or engagedagain with the large-diameter portion 36 b of the modified cam plate 32a. When the modified cam plate 32 a holds the large-diameter portion 36b thereof in its highest position as shown in FIG. 7, it is alsopossible for the second key K2 to have the lower end portion of thelatch plate 42 a selectively disengaged from or engaged again with thelarge-diameter portion 36 b of the modified cam plate 32 a.

Further, as shown in FIG. 8, when the small-diameter portion 37 of themodified cam plate 32 a is oppositely disposed from a lower end portionof the latch plate 42 a held in its lowest position, it is not possiblefor the second key K2 to have the lower end portion of the latch plate42 a engaged with the small-diameter portion 37 of the modified camplate 32 a. However, in this condition, it is possible for the first keyK1 to have a desired one of the large-diameter portion 36 b and thelargest-diameter portion 36 a of the modified cam plate 32 a selectivelyengaged with the lower end portion of the latch plate 42 a in anoverlapping manner.

As is clear from FIG. 1, in the first embodiment of the presentinvention, the handle holder 10 and the door handle 15 are provided withthe first lock 30 with the first key K1 and the second lock 40 with thesecond key K2, respectively. The user (i.e., door keeper) may use anyone of these keys K1, K2 to lock and unlock the door handle 15 withrespect to the handle holder 10. Consequently, it is possible for eachof two different users (or door keepers) to independently hold andmaintain each of these keys K1, K2 on an equal footing with each other.

In the first embodiment according to the second aspect of the presentinvention, since the second movable locking element 42 is so arranged asto be engaged with the first movable locking element 32, it is possibleto disengage these movable locking elements 32, 42 from each other bydisengaging a desired one of these elements 32, 42 from the other, whichresults in unlocking operation of the door handle 15 from the handleholder 10.

In the second embodiment according to the third aspect of the presentinvention, since the second embodiment has the above construction andaction, it is possible for the door keeper to determine which of thesekeys K1, K2 he or she uses as his or her primary control key.

Further, since the door locking handle assembly of the present inventionis provided with two pieces of the locks 30 and 40 together with theirkeys K1 and K2, it is possible to strictly improve the assembly inlocking mechanism and in appearance.

While the present invention has been particularly shown and describedwith reference to the preferred embodiments thereof, it will beunderstood by those skilled in the art that various modifications andchanges may be made therein without departing from the spirit of thepresent invention as defined by the appended claims.

What is claimed is:
 1. In a door locking handle assembly of a doublelock type having a construction in which: a handle holder (10) ismounted on a front surface (B1) of a door (B) by means of a screw (11),said screw (11) passing through said door (B) from a rear surface (B2)to fix said handle holder (10) to said front surface (B1) of said door(B); a handle shaft (12) extending in a direction perpendicular to theplane of said door (B) is mounted on a proximal end portion of saidhandle holder (10); a door handle (15) has a proximal end portionmounted on a front end portion (13) of said handle shaft (12) through apivot (14) extending in a direction perpendicular to a longitudinal axisof said handle shaft (12), said door handle (15) having a distal endportion swung between a folded position and a raised position thereof ina reciprocating manner; and, a catch plate for locking said door (B) toa stationary frame element is fixedly mounted on a rear end portion (16)of said handle shaft (12), said rear end portion (16) appearing in saidrear surface (B2) of said door (B), the improvement wherein: a firstlock (30) and a second lock (40) have their rear end portions fixedlymounted on an inner surface of a free end portion (17) of said doorhandle (15) and an inner surface of said handle holder (10),respectively, in a manner such that said locks (30, 40) are adjacent toeach other in arrangement; and said first lock (30) and said second lock(40) are provided with a first key (K1) and a second key (K2), to permita user to lock and unlock said door handle (15) using at least one ofsaid keys (K1, K2).
 2. The door locking handle assembly of the doublelock type as set forth in claim 1, wherein: each of said first lock (30)and said second lock (40) is constructed of a cylinder lock; said firstkey (K1) is inserted into said first lock (30) of said handle holder(10), and turned to rotate a first rotor (31) of said first lock (30),50 that a first movable locking element (32) is moved to a lockedposition adjacent to said free end portion of said door handle (15),wherein said first movable locking element (32) is constructed of alatch plate or a cam plate; and said second key (K2) is inserted intosaid second lock (40) of said door handle (15), and turned to rotate asecond rotor (41) of said second lock (40), so that a second movablelocking element (42) is moved between: a locked position in which saidsecond movable locking element (42) is engaged with said first movablelocking element (32); and, an unlocked position in which said secondmovable locking element (42) is disengaged from said first movablelocking element (32), wherein both said locked position and saidunlocked position of said second movable locking element (42) areadjacent to said first movable locking element (32).
 3. The door lockinghandle assembly of the double lock type as set forth in claim 1 or 2,wherein: said first rotor (31) of said first lock (30) disposed in saidhandle holder (10) is locked in each of two locked positions andunlocked in its unlocked position, wherein said two locked positions areangularly spaced apart from each other by a predetermined angle, each ofsaid two locked positions being also angularly spaced apart from saidunlocked position by a predetermined angle; said first movable lockingelement (32) is locked in each of two locked positions and unlocked inan unlocked position, wherein said two locked positions are angularlyspaced apart from each other by a predetermined angle and adjacent tosaid free end portion (17) of said door handle (15), each of said twolocked positions being also angularly spaced apart from said unlockedposition by a predetermined angle, wherein a first one of said twolocked positions is closer to said free end portion (17) of said doorhandle (15) than the other to disable said second movable lockingelement (42) from disengaging from said first movable locking element(32) even when said second movable locking element (42) is moved to saidunlocked position thereof; said first movable locking element (32) ismoved to said the other of said two locked positions thereof to enablesaid second movable locking element (42) to engage with and disengagefrom said first movable locking element (32); and in said unlockedposition of said first movable locking element (32), said second movablelocking element (42) is always disengaged from said first movablelocking element (32) irrespective of whether said second movable lockingelement (42) is in its locked position.
 4. The door locking handleassembly of the double lock type according to claim 1, wherein each ofsaid first lock (30) and said second lock (40) is a pin tumbler type. 5.The door locking handle assembly of the double lock type according toclaim 1, wherein each of said first lock (30) and said second lock (40)is a disc tumbler type.
 6. The door locking handle assembly of thedouble lock type according to claim 2, wherein said first movablelocking element (32) is constructed of a cam plate having a rotarymotion.
 7. The door locking handle assembly of the double lock typeaccording to claim 2, wherein said second movable locking element (42)is constructed of a latch plate having a reciprocating motion.
 8. Thedoor locking handle assembly of the double lock type according to claim2, wherein said second rotor (41) is attached to said second movablelocking element (42) by an eccentric pin (45) which extends rearwardfrom a rear surface of the second rotor (41).
 9. In a door lockinghandle assembly of a double lock type having a construction in which: ahandle holder (10) is mounted on a front surface (B1) of a door (B) bymeans of a screw (11), said screw (11) passing through said door (B)from a rear surface (B2) to fix said handle holder (10) to said frontsurface (B1) of said door (B); a handle shaft (12) extending in adirection perpendicular to the plane of said door (B) is mounted on aproximal end portion of said handle holder (10); a door handle (15) hasa proximal end portion mounted on a front end portion (13) of saidhandle shaft (12) through a pivot (14) extending in a directionperpendicular to a longitudinal axis of said handle shaft (12), saiddoor handle (15) having a distal end portion swung between a foldedposition and a raised position thereof in a reciprocating manner; and, acatch plate for locking said door (B) to a stationary frame element isfixedly mounted on a rear end portion (16) of said handle shaft (12),said rear end portion (16) appearing in said rear surface (B2) of saiddoor (B), the improvement wherein: a first lock (30) and a second lock(40) have their rear end portions fixedly mounted on an inner surface ofa free end portion (17) of said door handle (15) and an inner surface ofsaid handle holder (10) respectively, in a manner such that said locks(30,40) are adjacent to each other in arrangement; said first lock (30)and said second lock (40) are provided with a first key (K1) and asecond (K2), respectively, to permit a user to lock and unlock said doorhandle (15) using at least one of said keys (K1, K2), each of said firstlock (30) and said second lock (40) is constructed of a cylinder lock;said first key (K1) is inserted into said first lock (30) of said handleholder (10), and turned to rotate a first rotor (31) of said first lock(30), so that a first movable locking element (32) is moved to a lockedposition adjacent to said free end portion (17) of said door handle(15), wherein said first movable locking element (32) is constructed ofa cam plate; and said second key (K2) is inserted into said second lock(40) of said door handle (15), and turned to rotate a second rotor (41)of said second lock (40), so that a second movable locking element (42)is moved between: a locked position in which said second movable lockingelement (42) is engaged with said first movable locking element (32);and an unlocked position in which said second movable locking element(42) is disengaged from said first movable locking element (32); whereinboth said locked position and said unlocked position of said secondmovable locking element (42) are adjacent to said first movable lockingelement (32); and, said second movable locking element (42) isconstructed of a latch plate attached to said first rotor (31) by aneccentric pin (45).